HCN1 (O60741) variants and mutations

HCN1 (also known as O60741) is a human protein-coding gene encoding a potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1 protein. The protein forms a hyperpolarization-activated channel that conducts both potassium and sodium ions. It contributes to pacemaker currents and the neuronal I(h) current that shapes excitability, and HCN1 variants are associated with developmental epilepsy syndromes. This analysis covers 1,814 HCN1 variants and mutations. Of these, 64% have computational variant effect predictions. Disease context includes Generalized epilepsy with febrile seizures-plus, undetermined early-onset epileptic encephalopathy, and genetic developmental and epileptic encephalopathy. Example HCN1 variants include M1?, G3E, and G3V.

Variant analysis overview

Variant and mutation evidence

Clinical, disease, and population context

Protein structure and variant hotspots

Data sources

Evidence in this analysis draws on EBI Proteins Variation, UniProt, gnomAD v4, EuropePMC, 3D Hotspot Analysis, Interaction Network Analysis, Protein Data Bank, AlphaFold DB, gnomAD constraint, Open Targets, PharmGKB, MaveDB, LitVar.

Notable HCN1 variants

Examples include M1?, G3E, G3V, G4S, G5D, P7R, N8S, S9P. Listed records include available protein-change notation, database identifiers, clinical classifications, computational predictions, population evidence, experimental measurements, and disease context.